DC/DC Converter, Linear Technology, LT1912

500kHz Step-Down DC/DC Converter in 3mm x 3mm DFN

News Release from: Linear Technology (UK) Limited
07/04/2008

Linear Technology has announced the LT1912, a 2A, 36V step-down switching regulator packaged in a 3mm x 3mm DFN (or MSOP-10E). The LT1912's 3.6V to 36V input voltage range makes it ideal for load dump and cold-crank conditions found in automotive applications. Its 3.2A internal switch can deliver up to 2A of continuous output current to voltages as low as 0.79V.

Switching frequency is user-programmable from 200kHz to 500kHz, optimizing efficiency while keeping external components small. The combination of its 3mm x 3mm DFN-10 package (or thermally enhanced MSOP-10E) and tiny externals provide a very compact, thermally efficient footprint.

The LT1912 utilizes a high efficiency 3.2A, 0.25Ohm switch, with the necessary boost diode, oscillator, control and logic circuitry integrated on-chip. Special design techniques and a new high voltage process enable high efficiency over a wide input voltage range while the LT1912’s current mode topology enables fast transient response and excellent loop stability. Other features include external synchronization (from 250kHz to 500kHz), a power good flag and soft-start capability.